- Move USBHOST SAR enable to prcm_init
- Previous code was writing this bit every transition to off.
This is not required - one time enable is sufficient
- Enable USBTLL SAR for ES3.1 and above (also in one-time init)

- Move USBHOST SAR enable to prcm_init
- Previous code was writing this bit every transition to off.
This is not required - one time enable is sufficient
- Enable USBTLL SAR for ES3.1 and above (also in one-time init)